Additional weight or balancing weight that is used in conjunction with the EVO Zündung from Polini on engine cases with rotary valve crankshaft on your Piaggio Ciao, Si, Bravo and Boxer moped / moped to compensate for the resulting imbalance.
The balancing mass gives your engine a smooth, even running when stationary and in operation and improves the «starting behavior». Depending on the setting, even more torque can be achieved with the additional weight.
The flywheel is suitable for all gearbox types that are operated with a rotary valve. In addition to the Polini Speed Engine, this also includes the original engine gearbox.
| Ø inside | 90 mm |
| Ø outside | 120 mm |
| Thickness | 4 mm |
| Manufacturer | Polini |
| Number of fixing points | 5 pcs |
| Material | Steel |
| Surface | galvanized (blue) |
| Weight | 110 g |
| Area of application | Tuning |
| Piaggio | Ciao - P , SC , PX , C24 Si Bravo / Super Bravo Boxer Grillo |
Accessories & related products
Polini EVO Electronic ignition | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Polini · Light coil voltage: 12 V · Performance: 90 W · Direction of rotation: right · Ø Internal flywheel: 80.5 mm · Ø Flywheel outside: 105 mm · Ø Flywheel outside: 138.5 mm · Number of fixing points: 2 pcs · Weight: 554 g · Area of application: High End · Area of application: Racing · Area of application: Tuning
583,30 EUR
Polini EVO REED crankshaft 12 mm KoBo | Piaggio Ciao, SI, Bravo, Grillo
Manufacturer: Polini · Material: Steel · Cheek type: Full cheeks · Crankshaft stroke: 43 mm · Ø coupling pin / vario pin: 12 mm · Connecting rod length center-center: 87 mm · Total length crankpin ignition side: 91.5 mm · Total length crankpin ignition side: 105 mm · Ø crank webs: 70 mm · Ø piston pin (B): 12 mm · Ø Connecting rod eye: 15 mm · Bearing seat right: 15 mm · Ø Bearing seat (ignition side): 15 mm · Thread type: MF10x1.25 (fine pitch thread) · Thread length: 14 mm · Dimension needle bearing: 12 / 15 x 14.7 mm (axe 12) · Wide crank webs: 32.6 mm · Length 1st paragraph: 21 mm · Length 2nd paragraph: 44.7 mm · Length 3rd paragraph: 64 mm · Ø 1st step (on the coupling side): 15 mm · Ø 2nd shoulder (on the clutch side): 14.4 mm · Ø 3rd step (on the clutch side): 12 mm · Weight: 784 g · Number of gears: 1 pcs · Area of application: High End · Area of application: Racing · Area of application: Tuning
338,30 EUR
Polini 47 mm cylinder kit EVO 12 mm KoBo | Piaggio Ciao, SI, Bravo, Boxer
Nominal diameter: 47 mm · Manufacturer: Polini · Material: Gray cast iron · Displacement: 75 ccm · Crankshaft stroke: 43 mm · Ø cylinder neck: 49.8 mm · Ø Outlet outside: 22 mm · Ø Outlet outside: 27 mm · Ø piston pin (B): 12 mm · Hole spacing outlet: 23 mm · Hole spacing outlet: 38 mm · Thread outlet: M5x0.8 (standard thread) · Number of fixing points: 4 pcs · Hole pattern [mm]: 43 x 52 · Decompressor: Yes · Camouflaged: No · Area of application: High End · Area of application: Tuning
326,60 EUR
Polini CP 21 mm carburetor & air filter (hand choke) | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Polini · Camouflaged: No · Component group Carburetor: Carburetor complete · Material: Aluminum · Carburetor type: CP · Nominal diameter: 21 mm · Ø Inside entrance: 42 mm · Ø Output inside: 22.5 mm · Ø Air filter connection: 47 mm · Ø fuel hose connection: 6 mm · Ø fuel hose connection: 7 mm · Mixed oil connection: Yes · Vacuum connection: Yes · Choke control: Hand choke · Nozzle thread: M5x0.8 (standard thread) · Nozzle block: 35-12 · Nozzle size: 82 · Nozzle size: 84 · Nozzle size: 86 · Size of secondary nozzle: 40 · Mounting type: Rubber sleeve · Total length: 71 mm · Width: 66 mm · Height: 122 mm · Area of application: Racing · Area of application: Tuning
198,30 EUR
Polini piston 47 mm EVO cylinder (12 mm KoBo) | Piaggio Ciao, SI, Bravo, Boxer, Grillo
Manufacturer: Polini · Nominal diameter: 47 mm · Ø outside piston (A): 46.92 mm · Ø piston pin (B): 12 mm · Compression height (C): 31.6 mm · Curvature (D): 2 mm · Total piston height (E): 55.5 mm · Number of piston rings (F): 2 pcs · Piston ring mold: Rectangular ring · Piston ring impact: Internal fuse (IS) · Piston ring height: 1.2 mm · Weight piston kit: 101 g
102,60 EUR
Moped fans also bought
GPO 15 mm carburetor tuning | Puch
Manufacturer: GPO · Camouflaged: No · Component group Carburetor: Carburetor complete · Material: Aluminum · Carburetor type: SRE · Nominal diameter: 15 mm · Ø Internal connection: 20 mm · Ø Inside entrance: 15 mm · Ø Output inside: 15 mm · Ø Air filter connection: 20 mm · Ø fuel hose connection: 6 mm · Mixed oil connection: No · Vacuum connection: No · Choke control: Hand choke · Nozzle thread: M3.5x0.6 (standard thread) · Nozzle block: 2.17 · Nozzle size: 62 · Mounting type: Plug connection clamped · Clamping screw torque (max.): 4 N/m · Total length: 66 mm · Width: 50 mm · Height: 95 mm · Area of application: Tuning
75,70 EUR
Not so nice 
Chrome luggage rack | Puch Maxi S
Material: Steel · Surface: chrome-plated · Color: Chrome · Wheel size: 17 " · Total length: 425 mm · Width: 168 mm · Height: 32.5 mm · Mounting type: Nuts & bolts · Number of fixing points: 4 pcs · Ø mounting hole: 8.3 mm · Ø mounting hole: 9 mm · Hole spacing: 29 mm
23,20 EUR
Airsal 44 mm cylinder kit 65 ccm camouflaged | Puch
Manufacturer: Airsal · Material: Aluminum · Camouflaged: Yes · Surface: sandblasted · Displacement: 65 ccm · Nominal diameter: 44 mm · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Ø cylinder neck: 48 mm · Inlet window: 24 / 20 x 15 mm · Thread inlet: M6x1 (standard thread) · Ø outlet inside: 25 mm · Number of fixing points: 4 pcs · Hole spacing outlet: 42 mm · Area of application: Tuning · Outlet type: straight · Hole spacing inlet: 38 mm · Thread outlet: M6x1 (standard thread) · Hole pattern [mm]: 44 x 44 · Decompressor: Yes
116,60 EUR
Hot 
GPO mushroom air filter grille, Bing SRE (Ø=20 mm)
Manufacturer: GPO · Material: Metal · Camouflaged: No · Material: Rubber · Color: Chrome · Color: black · Filter type: Grille · Ø outside: 61 mm · Total length: 113 mm · Length rubber part: 63.5 mm · Length of filter section: 49 mm · Mounting type: Bride · Mounting type: Plug connection clamped · Ø Internal connection: 20 mm · Area of application: Tuning
15,10 EUR
Hot
Tank sticker "PUCH maxi S" 204 x 29 | Puch Maxi S
Material: Polyvinyl chloride (PVC) · Width: 204 mm · Color: Chrome · Color: black · Color: green · Color: white · Height: 29 mm · Place of use: Tank (+ frame) · Rear side texture: Adhesive · Consistency: UV-resistant · Consistency: petrol resistant · Border: Chrome surround · Transferfolie: No · Puch OEM number: 349.2.20.537.0
9,90 EUR
Plastic license plate holder (CH version)
Manufacturer: Made in Switzerland · Material: Brass · Material: Plastic · Thread type: M5x0.8 (standard thread) · Total length: 175 mm · Color: black · Width: 108 mm · Ø mounting hole: 6 mm · Thread length: 6 mm · Height: 11 mm · Mounting type: Nuts & bolts · Number of fixing points: 9 pcs · Hole spacing: 50 mm
9,20 EUR
Polini EVO Electronic ignition | Piaggio Ciao, SI, Bravo, Boxer
Manufacturer: Polini · Light coil voltage: 12 V · Performance: 90 W · Direction of rotation: right · Ø Internal flywheel: 80.5 mm · Ø Flywheel outside: 105 mm · Ø Flywheel outside: 138.5 mm · Number of fixing points: 2 pcs · Weight: 554 g · Area of application: High End · Area of application: Racing · Area of application: Tuning
583,30 EUR
Attention: new opening hours from 16.02.2026 & new evening sale on Thursday 17:30-20:00
